Mortising-tool.



No. 842.318. PATENTED JAN. 29, 1907. C. W. KINNEAR.

MORTISING TOOL.

2 sums-SHEET 1.

Q6 I 8 G98 (W U mvamtoz l/vtwzoaeo 7 M m fimmfifaoww No. 842,318. PATENTED JAN. 29, 1907. G. W. KINNEAR.

MORTISING TOOL.

APPLIOATION FILED MAR. 24.1906.

2 SHEETS-SHEET 2.

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Wibmmoco am a/MM CLIFFORD w. INNEAROF BEARDSTOWN, ILLINOIS.

MOBTlSING-TOOL.

Specification of Lettei's .Patent.

=Application filed March 24, 1905. Serial No. 307,823.

To'mZZ whmn it'may concern.-

Be .it known that I, CLIFFORD W. KIN- NEAR, a citizen of the United States, residing 'at Beardstown, in the county of Cass and State of Illinois, have invented certain new and useful Improvements in l\Iort1s1n"g-.' Io ols,

. which improvements-are fully described in the followin' specification, reference being also had to t e accompanying drawings.

This invention has for its object the production of a convenient and reasonably cheap mortising-tool for letting in locks in doors and for simultaneously boring for the knob-spindle and keyhole; the construction and operation of said toolbeing such that absolute accuracy is assured,

My said invention is clearly illustrated in.

- the annexed drawings, Figure 1 being a side elevation of a mort1s1ngtool embodying my.

present improvements and showing also a portion of a door to which the said tool'is' as sumed to be clamped. Fig. 2 is a top or plan. view of the same. Fig. 3 is' an elevation of said'tool as viewed from theend which'is clamped to the door when the tool is in servce. Fig 4 is a relatively enlarged de-- tached view of a removableshank used with the several. bits in the said tool, said shank being shown in Fig. 4 largely-in "central longitudinal section. .Fig. 5 is a vertical sectional view of the carriage l). Fig. 6is a side view, and Fig, 7 is a top view, of the carriage I) removed from the casing of the tool.

In these drawings the letter a indicates a light housing, preferably of cast metal, liaving sides a a) and bottom a and of suitable shapeto receive a carriage-b, which. isada'pted to slide withinsaid housing, said carriage having mounted therein a plurality of augerbits 0, that are geared together, as shown, and are thus adapted to rotate in unison. Every alternate auger is formed with a left hand cutting-bit, and one of said auger-s has its rear end extended, as at c, in order to receive a removable shank d, that may be used with an, ordinary carpenters brace. The carriage I) is prevented from backing completely out otthe housing by'stopa-ibsa.

The front end of the housing is open, as is best'soen in Fig. 3 of'the'drawings, and the sides of said housing are formed with xtension (5 a of plate form, between which the edge of the door may be entered, (see Figs. .1

and 2,) the inner races of said extensionplates being preferably faced with rubber or leather 0: in order to prevent scratching or otherwise disfiguring said door. I

After the mortising-tool has been slipped over the edge of'the door it is clamped in desired-position by means of a thumb-screw e, ,and when it is thus secured in position it will be obvious that the auger-bits 0 may be set in revolution and two or more holes bored simultaneously in the edge of said door. As the bits are drawn into the wood the carriage 6 works freely forward in the housing.

In order to borefor the'keyhole and knobspindle hole, I havblprovided slotted plates f g, that are adjustablyolamped to the extension-a by means of thumb-screws f g,

and 'ontlie outer or free ends of said adjustable plate I have formed bosses f 2 g, in which are auger-bits h it, that are forced normally outward springs h it, that abut enlarged heads-h b on the outer'endsof said 1 augers. These heads h h are .ofthe same size as the extension 0 of one of the augers' c, s'oljthat the shank- (i may be used with the said heads, as will be understood from the drawings. r. 5

Nhen it is desired to use my described tool, the housing is first clamped to the edge of the door at the point when the latter is to be mortised. The bits c are their rotated until the proper depth has been bored, when the said bits are backed out, the carriage b meanwhile sliding rearward'in the housing until it is stopped bythe ribs a The bit it is then bored through the door to provide an opening for the knob-spindle,- and finally the bit 72. is operated in like manner to provide keyhole-openings. after the tool has been once, adjusted it is. necessary to transfer it from door'to, door and bore as above described until all of the doors throughout a liousehave been bored.

The several auger-bits. are so arranged am supported that the-bored holes must be in absolutely correct relation to each other, and it will be obvious that by the use of such, 1% tool as I have described a great savingo time will be oilected.

- Having thus described my invention, i claim as my invention Letters Paten-t 1. In combination, a frame, means for clamping the same to a door, a carriage slidablymounted in said frame, a plurality of Patented Jan. 29,1907

It will be obvious that and wish to secure by angers h h adjustably mounted on said frame I angers revolubly mounted in said carriage, l i 3. In combination, a frame, a plurality of and an anger ad nSt-ably supported at a angel's slldably mounted in said frame, right angle to the sald plui'allty of angels. l means for clamping salcl frame to a door, and

2. In combination, a frame, a carriage angers 7L h adjustably mounted on said elidably mounted in said frame, a plurality frame and adapted to bore at right angles to 1 of angers revolullly mounted in said carriage, the said plurality ol angers.

CLU FORD \V. KINNEAR. at right, angles to the said. plurality of angers, I Witnesses: and springs for maintaining said angers In 71/ HENRY T."lnom snnne, in their inoperative positions. r i JOHN C. BRIGGS, J1. 

